Scilab Function
Last update : 12/1/2004

zpch1 - Chebyshev analog filter

### Calling Sequence

  `[poles,gain]=zpch1(n,epsilon,omegac)`

### Parameters

- `n`: integer (filter order)
- `epsilon`: real : ripple in the pass band (`0<epsilon<1`)
- `omegac`: real : cut-off frequency in Hertz
- `poles`: resulting filter poles
- `gain`: resulting filter gain

### Description

Poles of a Type 1 Chebyshev analog filter. The transfer function is given by :

     H(s)=gain/poly(poles,'s')

### Author

F.D.